64725241824 has 72 divisors (see below), whose sum is σ = 184487848272. Its totient is φ = 21525212160.

The previous prime is 64725241811. The next prime is 64725241829. The reversal of 64725241824 is 42814252746.

64725241824 is a `hidden beast` number, since 6 + 47 + 2 + 524 + 1 + 82 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64725241824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64725241829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134812 + ... + 384219.

It is an arithmetic number, because the mean of its divisors is an integer number (2562331226).

Almost surely, 2^64725241824 is an apocalyptic number.

It is an amenable number.

64725241824 is an abundant number, since it is smaller than the sum of its proper divisors (119762606448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64725241824 is a wasteful number, since it uses less digits than its factorization.

64725241824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519480 (or 519469 counting only the distinct ones).

The product of its digits is 860160, while the sum is 45.

The spelling of 64725241824 in words is "sixty-four billion, seven hundred twenty-five million, two hundred forty-one thousand, eight hundred twenty-four".